LP FlameBlock Fire-Rated Sheathing for Siding Systems
Fire-rated structural sheathing that helps slow flame spread behind siding as part of the Harden Your Home™ Program.
When homeowners think about improving wildfire resistance, the conversation usually starts with the siding. The siding is the most visible layer of the exterior, but it is only one part of the wall assembly protecting the home. Behind the siding are structural layers that influence how heat, flames, and embers interact with the exterior wall. Upgrading those layers during a siding project can strengthen the overall system and improve how the home responds to wildfire exposure. LP FlameBlock® Fire-Rated Sheathing is one of the structural upgrades that can be considered during siding replacement. Installed behind the siding, it adds a fire-resistant structural panel designed to help slow flame spread as part of a properly constructed exterior wall assembly.
What Is LP FlameBlock Sheathing?
LP FlameBlock Fire-Rated Sheathing is a structural wood panel designed to combine strength and fire resistance in a single product. The panel is manufactured with LP’s proprietary Pyrotite® coating, a fire-resistant layer reinforced with fireglass that is bonded directly to the sheathing panel.
This coating is engineered to help slow flame spread and resist burn-through when exposed to fire. When installed as part of a properly designed wall assembly, LP FlameBlock sheathing can meet fire-resistance building code requirements used in certain fire-rated construction assemblies.
Unlike traditional structural sheathing, which primarily provides structural support behind siding, LP FlameBlock sheathing introduces fire-resistance properties into the wall system itself. This means the wall assembly supporting the siding contributes to slowing flame spread rather than relying only on the exterior cladding.
Homeowners considering wildfire mitigation upgrades often explore improvements to the entire exterior envelope of the home. Programs like our Harden Your Home™ Program focus on evaluating multiple exterior components that may influence wildfire vulnerability, including siding, roofing, vents, and the structural layers behind the siding.
Defend Your Home Against Wildfires
Our Harden Your Home™ Program helps homeowners reduce wildfire risk by upgrading vulnerable exterior components with Class A fire-rated, WUI-compliant materials. Protect your property, meet 2026 resiliency codes, and improve insurability with proven structural defenses.
Why the Sheathing Behind Your Siding Matters
The siding on a home is only the outermost layer of the exterior wall system. Behind the siding are several structural layers that work together to protect the home, including sheathing, framing, house wrap, and insulation.
During a wildfire, these layers may be exposed to intense radiant heat, airborne embers, and direct flame exposure. While no product can make a home fireproof, improving the materials used in the wall assembly may help slow how fire interacts with the structure.
Upgrading the structural sheathing during a siding replacement project can strengthen the wall system supporting the siding. When fire-resistant sheathing is installed behind durable siding materials, the wall assembly gains another layer designed to resist flame spread.
Wildfire mitigation strategies often address multiple areas of the exterior at the same time. In addition to siding and wall assemblies, vulnerable points around a home can include rooflines, attic vents, soffits, and windows. Improving these areas together can reduce potential entry points for embers and heat.
Homes located near or within the Wildland-Urban Interface may face greater wildfire exposure due to the proximity of vegetation and open land. For these homes, strengthening the exterior building envelope can be an important step toward improving wildfire resilience.
Part of a Fire-Resistant Siding System Through the Harden Your Home™ Program
Wildfire mitigation works best when the exterior of a home is evaluated as a complete system. Rather than focusing on a single upgrade, the Harden Your Home™ Program looks at multiple exterior components that influence wildfire exposure.
LP FlameBlock sheathing can be installed during siding replacement as part of a broader fire-resistant siding system. Installed behind durable siding and paired with proper trim and ventilation protection, it helps strengthen the wall assembly supporting the home’s exterior.
A wildfire-resistant exterior strategy may include improvements such as:
• Fire-resistant siding materials
• Structural sheathing upgrades behind the siding
• Ember-resistant ventilation systems
• Reinforced soffit and fascia areas
• Roofing and window systems designed to reduce wildfire vulnerability
Because every home is different, the most effective mitigation strategy depends on the home’s design, surroundings, and existing exterior materials. Through the Harden Your Home™ Program, Road Home Exteriors performs a 28-point wildfire risk assessment to help homeowners identify upgrades that may provide the greatest benefit.
During siding replacement projects, homeowners may also choose to upgrade exterior vents that could allow embers to enter attic spaces or wall cavities.
By improving multiple exterior components together, homeowners can build a stronger siding system and a more resilient exterior better prepared for wildfire exposure.
Ready to Harden Your Home?
Road Home Exteriors can evaluate your siding system and underlying wall assembly to determine whether LP FlameBlock sheathing is a good fit for your home. As part of the Harden Your Home™ Program, our team can recommend exterior upgrades designed to help improve wildfire resilience.
Where We Offer Wildfire-Ready Exterior Services
Our Service Areas
Road Home Exteriors proudly serves the following Colorado communities:
Arvada
Aurora
Bennett
Boulder
Brighton
Broomfield
Byers
Castle Pines
Castle Rock
Centennial
Commerce City
Conifer
Dacono
Denver
Edgewater
Elizabeth
Englewood
Erie
Evergreen
Federal Heights
Firestone
Fort Lupton
Franktown
Frederick
Golden
Greenwood Village
Gunbarrel
Highlands Ranch
Hudson
Indian Hills
Jefferson County
Ken Caryl
Kiowa
Lakewood
Larkspur
Littleton
Lochbuie
Lone Tree
Longmont
Louisville
Louviers
Morrison
Niwot
Northglenn
Parker
Roxborough Park
Sedalia
Sterling Ranch
Strasburg
Superior
The Pinery
Thornton
Watkins
Wattenberg
Westminster
Wheat Ridge
What Makes Us Different?
Lifetime Workmanship Warranty
At Road Home Exteriors, we back every project with our Lifetime Workmanship Warranty because we’re confident in the quality of our roofing, siding, and window installations. This warranty covers installation-related issues as long as you have your home, giving you lasting protection without hidden loopholes.
No-Pressure Sales
Our No-Pressure Sales approach means you’ll never feel rushed or pushed into a decision. We’re here to educate, not upsell—giving you the facts so you can choose what’s best for your home. No gimmicks, no “sign-now” discounts—just honest guidance and answers every step of the way.
No Change Order Guarantee
The price we quote is the price you pay—no hidden fees, no surprise change orders. Our No Change Order Guarantee ensures your roofing, siding, or window project stays exactly as planned unless you decide to make changes. We’re committed to clear communication and delivering your project on time and on budget every step of the way.
Do What Is Expected, Then Do More™
This isn’t just a tagline – it’s how we operate every single day. At Road Home Exteriors, we believe the baseline is doing the job right: accurate inspections, honest pricing, quality craftsmanship, and clear communication. But we don’t stop there.
We go further by educating our customers, standing behind our work, and treating every home like it’s our own. From the first consultation to the final walkthrough, our goal is to exceed expectations – not just meet them.